Thanks Scotff and Cranky108, looking at the manual and talking to the manufacturer the low end frequencies will not work with this type of tuner model. We tried using a different model (3rd order filter) line tuner and this type of tuner will only work with 10 dB return loss (10% reflected...
How can I determine the frequency range limits of a line tuner to make sure that the low and high frequencies I picked will work for a power line carrier application?
The line tuner is Trench, model A9508, bandpass, the frequencies I would like to use are:
DCB 129kHz
TTR 74kHz and 74.5kHz
TTT...
We just ordered 21 Pascor Atlantic double end break disconnect switches(TTT-7), 5000A rated for a 345kV sub. The switches have been delivered to the site now we are considering on adding ground switches to the new switches. Does any one know how much effort or what will it take to add a ground...
Does anyone know what is the minimum warranty on EHV equipment? We order two 150MVA reactors and one 600MVA transformer for a client, The client would like to know what is the minimum warranty on these type of EHV equipment. Does anyone know what type of of warranty is recommended for these...
We are currently working on the protection for a variable 345kv, 100MVAR Reactor. We are planning on using a 487E and 387E for differential for primary and secondary protection. The reactor’s neutral side is grounded directly, so I am assuming that the voltage on that side is zero. I wonder if...
@bacond4life, yes the 3rd relay is a 351S it will provide over-current protection as well as BF, what would you conciser as adequate protection for this application? I am not 100% sure what you meant by "are the Reactor CT's a better ratio for the 387E". The Reactor CT's will be C800, 600:5 -...
A client will be installing a set of two 50-100 MVAR Reactors. I do not have much experience on reactor protection but I do have a few references from SEL that I can use. The Reactor will be connected to a 345kV bus (along with a synchronous breaker), the low side of the reactor will be tied to...
This is my first time working on a disconnect switch replacement project for a local client. The high of the existing disconnect is 21 FT and that is from the top of its foundation to the center line of the disconnect 4-hole pad (as well as the center line of the bus). The new switch is 0.125...
